Rehash: Resumable Hashlib
Rehash is a resumable interface to the OpenSSL-based hashers (message digest objects) in the CPython hashlib standard library. Rehash provides hashers that can be pickled, persisted and reconstituted from their repr(), and otherwise serialized. The rest of the Rehash API is identical to hashlib.
Rehash hashers can be used to checkpoint and restore progress when hashing large byte streams:
import pickle, rehash
hasher = rehash.sha256(b"foo")
state = pickle.dumps(hasher)
hasher2 = pickle.loads(state)
hasher2.update(b"bar")
assert hasher2.hexdigest() == rehash.sha256(b"foobar").hexdigest()Installation
pip install rehash
Applications
Rehash is useful in any situation when your VM is short-lived or preemptible, and the object you’re hashing is huge. For example, Rehash can be used to hand off the hashing state of large objects between AWS Lambda functions or Google Cloud Functions, which have runtime limits of 15 and 9 minutes, respectively.
Links
Bugs
Please report bugs, issues, feature requests, etc. on GitHub.
License
Licensed under the terms of the Apache License, Version 2.0.
1 maintainer
Metadata
1 maintainer
Release files for rehash 1.0.1
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Source distribution (sdist)
| File | Size | Uploaded | Provenance | Actions |
|---|---|---|---|---|
| rehash-1.0.1.tar.gz | 9.3 kB | Without provenance | Details for rehash-1.0.1.tar.gz |
Built distribution (wheel)
| File | Interpreter | ABI | Platform | Actions Reset |
|---|---|---|---|---|
| rehash-1.0.1-py2.py3-none-any.whl | Python 3, Python 2 | none | any | Details for rehash-1.0.1-py2.py3-none-any.whl |
Total release size: 18.3 kB
Release files / rehash-1.0.1.tar.gz
| Download URL | rehash-1.0.1.tar.gz |
|---|---|
| Size | 9.3 kB |
| Tags | Source |
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SHA-256 checksum How to use checksums |
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| Upload date | |
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Uploaded using Trusted Publishing? What is trusted publishing? |
No |
| Uploaded via |
twine/3.4.1 importlib_metadata/4.6.0 pkginfo/1.7.0 requests/2.25.1 requests-toolbelt/0.9.1 tqdm/4.61.1 CPython/3.9.13
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Release files / rehash-1.0.1-py2.py3-none-any.whl
| Download URL | rehash-1.0.1-py2.py3-none-any.whl |
|---|---|
| Size | 9.0 kB |
| Tags | Python 2 Python 3 |
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SHA-256 checksum How to use checksums |
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BLAKE2b-256 checksum How to use checksums |
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| Upload date | |
|
Uploaded using Trusted Publishing? What is trusted publishing? |
No |
| Uploaded via |
twine/3.4.1 importlib_metadata/4.6.0 pkginfo/1.7.0 requests/2.25.1 requests-toolbelt/0.9.1 tqdm/4.61.1 CPython/3.9.13
|
Security for rehash 1.0.1
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